CN105504792B - 一种透明阻燃尼龙树脂及其制备方法 - Google Patents
一种透明阻燃尼龙树脂及其制备方法 Download PDFInfo
- Publication number
- CN105504792B CN105504792B CN201511008348.6A CN201511008348A CN105504792B CN 105504792 B CN105504792 B CN 105504792B CN 201511008348 A CN201511008348 A CN 201511008348A CN 105504792 B CN105504792 B CN 105504792B
- Authority
- CN
- China
- Prior art keywords
- nylon resin
- nylon
- retarding
- transparent flame
- melamine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004677 Nylon Substances 0.000 title claims abstract description 59
- 229920001778 nylon Polymers 0.000 title claims abstract description 59
- 229920005989 resin Polymers 0.000 title claims abstract description 42
- 239000011347 resin Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003063 flame retardant Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 17
- 238000005453 pelletization Methods 0.000 claims description 17
- 229920002292 Nylon 6 Polymers 0.000 claims description 14
- QKBWNOXQJBGKCH-UHFFFAOYSA-N phenylphosphonic acid;sodium Chemical compound [Na].OP(O)(=O)C1=CC=CC=C1 QKBWNOXQJBGKCH-UHFFFAOYSA-N 0.000 claims description 9
- 239000002667 nucleating agent Substances 0.000 claims description 8
- OBNAOHSAPQWLGU-UHFFFAOYSA-N phthalic acid;1,3,5-triazine-2,4,6-triamine Chemical compound NC1=NC(N)=NC(N)=N1.OC(=O)C1=CC=CC=C1C(O)=O OBNAOHSAPQWLGU-UHFFFAOYSA-N 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 7
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 6
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 6
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 claims description 6
- 150000007974 melamines Chemical class 0.000 claims description 5
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 4
- 229920000299 Nylon 12 Polymers 0.000 claims description 4
- 229920000305 Nylon 6,10 Polymers 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 235000012222 talc Nutrition 0.000 claims description 4
- 239000005711 Benzoic acid Substances 0.000 claims description 3
- 235000010233 benzoic acid Nutrition 0.000 claims description 3
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 3
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- GDYQAFUGLCWUFD-UHFFFAOYSA-N N1=C(N)N=C(N)N=C1N.C(C1=CC=CC=C1)(=O)O Chemical compound N1=C(N)N=C(N)N=C1N.C(C1=CC=CC=C1)(=O)O GDYQAFUGLCWUFD-UHFFFAOYSA-N 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- OWUDFCCCSKRXAN-UHFFFAOYSA-N oxalic acid;1,3,5-triazine-2,4,6-triamine Chemical class OC(=O)C(O)=O.NC1=NC(N)=NC(N)=N1 OWUDFCCCSKRXAN-UHFFFAOYSA-N 0.000 claims description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims 4
- 229920000877 Melamine resin Polymers 0.000 abstract description 15
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract description 14
- 230000006750 UV protection Effects 0.000 abstract 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 229920000571 Nylon 11 Polymers 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- -1 amine cyanurate Chemical class 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- GEHMBYLTCISYNY-UHFFFAOYSA-N Ammonium sulfamate Chemical compound [NH4+].NS([O-])(=O)=O GEHMBYLTCISYNY-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 229920006152 PA1010 Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/092—Polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34922—Melamine; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008348.6A CN105504792B (zh) | 2015-12-29 | 2015-12-29 | 一种透明阻燃尼龙树脂及其制备方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511008348.6A CN105504792B (zh) | 2015-12-29 | 2015-12-29 | 一种透明阻燃尼龙树脂及其制备方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105504792A CN105504792A (zh) | 2016-04-20 |
| CN105504792B true CN105504792B (zh) | 2019-11-22 |
Family
ID=55713114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511008348.6A Active CN105504792B (zh) | 2015-12-29 | 2015-12-29 | 一种透明阻燃尼龙树脂及其制备方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105504792B (zh) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867177A (zh) * | 2016-12-16 | 2017-06-20 | 宁波和塑塑业科技有限公司 | 一种高耐磨超韧环保阻燃尼龙齿轮 |
| CN106700527A (zh) * | 2016-12-29 | 2017-05-24 | 湖州利鹏新材料科技有限公司 | 一种阻燃聚酰胺树脂组合物及其制备方法 |
| CN108165002A (zh) * | 2017-12-25 | 2018-06-15 | 江苏金发科技新材料有限公司 | Mca阻燃尼龙66复合材料及其制备方法 |
| CN111087799B (zh) * | 2019-12-18 | 2022-03-22 | 南京聚隆科技股份有限公司 | 一种透明阻燃尼龙材料及其制备方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146155A (zh) * | 2011-12-07 | 2013-06-12 | 杜邦公司 | 阻燃性聚对苯二甲酸丙二酯组合物及其制备方法 |
| CN103242655A (zh) * | 2013-05-31 | 2013-08-14 | 东莞市国立科技有限公司 | 无卤阻燃pa66塑胶改性材料及其制备方法 |
| CN103627167A (zh) * | 2013-11-04 | 2014-03-12 | 天津金发新材料有限公司 | 一种耐疲劳、高灼热丝性能无卤阻燃增强聚酰胺复合材料及其制备方法和应用 |
| CN104017362A (zh) * | 2014-05-20 | 2014-09-03 | 金发科技股份有限公司 | 一种具有良好表面性能的pa66组合物及其制备方法 |
| CN104592747A (zh) * | 2015-01-30 | 2015-05-06 | 江苏弘盛新材料股份有限公司 | 一种耐光热阻燃聚酰胺6及其制备方法和应用 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100633377B1 (ko) * | 1998-12-10 | 2006-10-16 | 솔루티아인코포레이티드 | 비-할로겐화 폴리아미드 조성물 |
-
2015
- 2015-12-29 CN CN201511008348.6A patent/CN105504792B/zh active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146155A (zh) * | 2011-12-07 | 2013-06-12 | 杜邦公司 | 阻燃性聚对苯二甲酸丙二酯组合物及其制备方法 |
| CN103242655A (zh) * | 2013-05-31 | 2013-08-14 | 东莞市国立科技有限公司 | 无卤阻燃pa66塑胶改性材料及其制备方法 |
| CN103627167A (zh) * | 2013-11-04 | 2014-03-12 | 天津金发新材料有限公司 | 一种耐疲劳、高灼热丝性能无卤阻燃增强聚酰胺复合材料及其制备方法和应用 |
| CN104017362A (zh) * | 2014-05-20 | 2014-09-03 | 金发科技股份有限公司 | 一种具有良好表面性能的pa66组合物及其制备方法 |
| CN104592747A (zh) * | 2015-01-30 | 2015-05-06 | 江苏弘盛新材料股份有限公司 | 一种耐光热阻燃聚酰胺6及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105504792A (zh) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105504792B (zh) | 一种透明阻燃尼龙树脂及其制备方法 | |
| CN112409693B (zh) | 具有良好阻燃和加工性能的无卤阻燃剂及阻燃树脂组合物 | |
| CN102321362B (zh) | 一种高阻燃性聚酰胺 | |
| CN104177791B (zh) | 一种无卤膨胀阻燃pbt及其制备方法 | |
| CN103030836B (zh) | 一种无卤阻燃剂及其制备方法 | |
| CN101792602A (zh) | 无卤膨胀型阻燃热塑性树脂组合物 | |
| CN103013087A (zh) | 一种led专用阻燃光扩散级聚碳酸酯组合物及其制备方法 | |
| BR112014025581A8 (pt) | Composição de poliéster, método para produzir uma composição de poliéster, composição de revestimento, dispersão aquosa, solução, camada de revestimento e substrato revestido | |
| EP2998349B1 (en) | Organic materials as fire and flame retardant synergists | |
| CN108250537B (zh) | 一种环保抗uv阻燃聚乙烯材料及其制备方法 | |
| CN101967277A (zh) | 耐低温无卤阻燃尼龙复合材料的制备 | |
| US20030012937A1 (en) | White flame-resistant uv-stable thermoformable film made from a crystallisable thermoplastic,a method for production and the use thereof | |
| CN104194319A (zh) | 一种无卤高阻燃聚异氰脲酸酯泡沫体及其制备方法 | |
| CN104877177A (zh) | 一种包覆型阻燃剂及其制备方法与应用和由其组成的模塑组合物 | |
| CN103044868B (zh) | 无卤阻燃聚对苯二甲酸丁二醇酯/玻纤复合材料及其制备方法 | |
| CN109575430A (zh) | 一种无卤阻燃聚丙烯材料及其制备方法 | |
| CN112409770B (zh) | 低烟密度低热释放无卤阻燃pc材料及其制备方法和应用 | |
| Li et al. | Physicochemical Mechanism of Flame‐Retardant Enhancement for Elastomeric Polyurea: A Mini‐Review | |
| CN101440212A (zh) | 一种热塑性环保阻燃增强尼龙6和尼龙66合金 | |
| CN110819092A (zh) | 一种高硬度高阻燃聚碳酸酯复合材料 | |
| CN110218357B (zh) | 一种耐析出膨胀型阻燃剂及其制备方法 | |
| CN1854189A (zh) | 热塑性无卤阻燃增强尼龙6树脂组合物 | |
| CN105820531A (zh) | 一种led灯导光板配方 | |
| CN105111728A (zh) | 一种阻燃尼龙树脂的制备工艺 | |
| CN103660306A (zh) | 一种无卤阻燃热塑性聚酯组合物的成型方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200818 Address after: 201613, Songjiang District, China Road, No. 68, 13, 5, Shanghai Patentee after: Shanghai Li Dao new material Polytron Technologies Inc. Address before: 2 A328 room 1236, 313099 Dragon King Road, Huzhou, Zhejiang Patentee before: HUZHOU LIPENG NEW MATERIAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210120 Address after: 425300 East 1st ring road, Daoxian Industrial Park, Yongzhou City, Hunan Province Patentee after: HUNAN MEILAIPO SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 5 / F, building 13, No. 68, Zhongchuang Road, Songjiang District, Shanghai, 201613 Patentee before: Shanghai Li Dao new material Polytron Technologies Inc. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Transparent flame retardant nylon resin and its preparation method Effective date of registration: 20210712 Granted publication date: 20191122 Pledgee: Agricultural Bank of China Limited Daoxian sub branch Pledgor: HUNAN MEILAIPO SCIENCE AND TECHNOLOGY Co.,Ltd. Registration number: Y2021980006012 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230718 Granted publication date: 20191122 Pledgee: Agricultural Bank of China Limited Daoxian sub branch Pledgor: HUNAN MEILAIPO SCIENCE AND TECHNOLOGY CO.,LTD. Registration number: Y2021980006012 |